These screws allow you to fine tune the fitment of your firearm's upper and lower receiver. All Gen 4 Lower Receivers, P-15 Lower Receivers, Phoenix Lower Receivers, and Rogue Upper Receivers come with these screws pre-installed.
The Nylon Tension Screw in your POF-USA firearm allows you to fine tune the fit of the upper and lower receiver. Gen 4 lower receivers and Rogue upper receivers feature Nylon Tension Screws.
